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On the anomalous adsorption of [Pd(edta)](2-) at the water/goethite interface: Spectroscopic evidence for two types of surface complexes

Kaplun, Marina; Nordin, Agneta and Persson, Per LU (2008) In Langmuir 24. p.483-489
Abstract
The structure of palladium(II) ethylenediaminetetraacetate (edta) in aqueous solutions and its adsorption on the surface of goethite (alpha-FeOOH) were studied using extended X-ray absorption fine structure spectroscopy and attenuated total reflection Fourier transform infrared spectroscopy. The obtained results show that in aqueous solutions, Pd-edta exists as a 1:1 complex, [P(edta)](2-), with edta acting as a quadridentate ligand. On the surface of goethite, [Pd(edta)](2-) forms two different types of complexes over a pH range of 3.40-8.12. At pH < 5, [Pd(edta)](2-) adsorbs as an outer-sphere species with possible hydrogen bonding. At higher pH values, the formation of inner-sphere complexes of the cation-type sets in after a... (More)
The structure of palladium(II) ethylenediaminetetraacetate (edta) in aqueous solutions and its adsorption on the surface of goethite (alpha-FeOOH) were studied using extended X-ray absorption fine structure spectroscopy and attenuated total reflection Fourier transform infrared spectroscopy. The obtained results show that in aqueous solutions, Pd-edta exists as a 1:1 complex, [P(edta)](2-), with edta acting as a quadridentate ligand. On the surface of goethite, [Pd(edta)](2-) forms two different types of complexes over a pH range of 3.40-8.12. At pH < 5, [Pd(edta)](2-) adsorbs as an outer-sphere species with possible hydrogen bonding. At higher pH values, the formation of inner-sphere complexes of the cation-type sets in after a cleavage of one glycinate ring and the formation of an (edta)Pd-O-Fe linkage. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
24
pages
483 - 489
publisher
The American Chemical Society
external identifiers
  • scopus:38749142143
ISSN
0743-7463
DOI
10.1021/la702735y
language
English
LU publication?
no
id
acbe28b2-3c68-48e8-a04d-0b5360578b12 (old id 4332422)
date added to LUP
2014-03-04 09:47:34
date last changed
2017-01-01 04:47:20
@article{acbe28b2-3c68-48e8-a04d-0b5360578b12,
  abstract     = {The structure of palladium(II) ethylenediaminetetraacetate (edta) in aqueous solutions and its adsorption on the surface of goethite (alpha-FeOOH) were studied using extended X-ray absorption fine structure spectroscopy and attenuated total reflection Fourier transform infrared spectroscopy. The obtained results show that in aqueous solutions, Pd-edta exists as a 1:1 complex, [P(edta)](2-), with edta acting as a quadridentate ligand. On the surface of goethite, [Pd(edta)](2-) forms two different types of complexes over a pH range of 3.40-8.12. At pH &lt; 5, [Pd(edta)](2-) adsorbs as an outer-sphere species with possible hydrogen bonding. At higher pH values, the formation of inner-sphere complexes of the cation-type sets in after a cleavage of one glycinate ring and the formation of an (edta)Pd-O-Fe linkage.},
  author       = {Kaplun, Marina and Nordin, Agneta and Persson, Per},
  issn         = {0743-7463},
  language     = {eng},
  pages        = {483--489},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {On the anomalous adsorption of [Pd(edta)](2-) at the water/goethite interface: Spectroscopic evidence for two types of surface complexes},
  url          = {http://dx.doi.org/10.1021/la702735y},
  volume       = {24},
  year         = {2008},
}